US 11,971,302 B2
System for the real-time high precision measurement of the atmospheric attenuation of electromagnetic radiation from at least one source and method for measurement
Carlos Fernández Peruchena, Navarra (ES); Ana Bernardos García, Navarra (ES); Marcelino Sánchez González, Navarra (ES); Carlos Heras Vila, Saragossa (ES); Iñigo Salina Áriz, Saragossa (ES); and Rafael Alonso Esteban, Saragossa (ES)
Assigned to FUNDACIÓN CENER-CIEMAT, Sarriguren (ES)
Appl. No. 17/262,348
Filed by FUNDACIÓN CENER-CIEMAT, Sarriguren (ES)
PCT Filed Jul. 25, 2019, PCT No. PCT/ES2019/070522
§ 371(c)(1), (2) Date Jan. 22, 2021,
PCT Pub. No. WO2020/021146, PCT Pub. Date Jan. 30, 2020.
Claims priority of application No. ES201830758 (ES), filed on Jul. 25, 2018.
Prior Publication US 2021/0223101 A1, Jul. 22, 2021
Int. Cl. G01J 3/28 (2006.01); F24S 90/00 (2018.01); G01J 3/02 (2006.01); G01J 3/42 (2006.01)
CPC G01J 3/2803 (2013.01) [F24S 90/00 (2018.05); G01J 3/0218 (2013.01); G01J 3/42 (2013.01); F24S 2201/00 (2018.05)] 10 Claims
OG exemplary drawing
 
1. A system for real-time spectral width resolution measurement of atmospheric attenuation spectrum of electromagnetic radiation, comprising:
at least one electromagnetic radiation source,
at least two reflective telescopes configured to capture a beam of radiation from only said electromagnetic radiation source and that are located at different distances from said source, each reflective telescope comprising a diaphragm between a telescopic objective and an eyepiece of the reflective telescope to limit an angle of acceptance of the reflective telescope and avoid capturing light that comes from outside the electromagnetic radiation source of the system,
at least one system for optical alignment of each reflective telescope with the electromagnetic radiation source,
at least one photodiode array spectrometer as real time detection and measurement device, optically connected to each of the reflective telescopes to provide measurements of the radiation in a solar spectral range between 300 nm and 1650 nm,
splitting means for splitting the beam of radiation after each eyepiece to take one part of the beam to the at least one array spectrometer and another part of the beam to the system for optical alignment of each reflective telescope with the electromagnetic radiation source, and
at least one processor for the communication between the spectrometers; for analyzing the measurements from signals detected by the spectrometers; as well as for inferring solar energy attenuation in the distance between the reflective telescopes through the difference, in real-time, of spectral energy that strikes in said reflective telescopes; and for calculating, in said distance between the reflective telescopes:
a monochromatic atmospheric attenuation for each wavelength of the spectrum,
a relative spectral atmospheric attenuation, by comparing spectral curves obtained from the measurements of each detection and measurement device,
an absolute spectral atmospheric attenuation, and
a global attenuation from this attenuation spectrum,
such that the global attenuation is calculated by integrating the relative spectral attenuation or the absolute spectral attenuation in a spectral range between 300 nm and 1650 nm of measurement weighted with a solar spectrum.